MAX907/MAX908/MAX909
Single/Dual/Quad High-Speed, Ultra Low-Power,
Single-Supply TTL Comparators
________________________________________________________________ Maxim Integrated Products
1
1
2
3
4
8
7
6
5
V+
OUTB
INB-
INB+
GND
INA+
INA-
OUTA
MAX907
DIP/SO
TOP VIEW
1
2
3
4
14
13
12
11
OUTD
IND-
IND+
GND
V+
INA+
INA-
OUTA
MAX908
DIP/SO
5
6
7
10
9
8
INC+
INC-
OUTC
OUTB
INB-
INB+
_________________Pin Configurations
Call toll free 1-800-998-8800 for free samples or literature.
19-0129; Rev. 3; 7/94
_______________General Description
The MAX907/MAX908/MAX909 dual, quad, and single
high-speed, ultra low-power voltage comparators are
designed for use in systems powered from a single
+5V supply; the MAX909 also accepts dual ±5V sup-
plies. Their 40ns propagation delay (with 5mV input
overdrive) is achieved with a power consumption of
only 3.5mW per comparator. The wide input common-
mode range extends from 200mV below ground (below
the negative supply rail for the MAX909) to within 1.5V
of the positive supply rail.
Because they are micropower, high-speed compara-
tors that operate from a single +5V supply and include
built-in hysteresis, these devices replace a variety of
older comparators in a wide range of applications.
MAX907/MAX908/MAX909 outputs are TTL compati-
ble, requiring no external pull-up circuitry. All inputs
and outputs can be continuously shorted to either sup-
ply rail without damage. These easy-to-use compara-
tors incorporate internal hysteresis to ensure clean out-
put switching even when the devices are driven by a
slow-moving input signal.
The MAX909 features complementary outputs and an
output latch. A separate supply pin for extending the
analog input range down to -5V is also provided.
The dual MAX907 and single MAX909 are available in
8-pin DIP and small-outline packages, and the quad
MAX908 is available in 14-pin DIP and small-outline
packages. These comparators are ideal for single
+5V-supply applications that require the combination
of high speed, precision, and ultra-low power
dissipation.
_______________________Applications
Battery-Powered Systems
High-Speed A/D Converters
High-Speed V/F Converters
Line Receivers
Threshold Detectors/Discriminators
High-Speed Sampling Circuits
Zero Crossing Detectors
___________________________Features
o
40ns Propagation Delay
o
700µA (3.5mW) Supply Current per Comparator
o
Single 4.5V to 5.5V Supply Operation
(or ±5V, MAX909 only)
o
Wide Input Range Includes Ground
(or -5V, MAX909 only)
o
Low, 500µV Offset Voltage
o
Internal Hysteresis Provides Clean Switching
o
TTL-Compatible Outputs
(Complementary on MAX909)
o
Input and Output Short-Circuit Protection
o
Internal Latch (MAX909 only)
______________Ordering Information
PART
TEMP. RANGE
PIN-PACKAGE
MAX907
CPA
0°C to +70°C
8 Plastic DIP
MAX907CSA
0°C to +70°C
8 SO
MAX907C/D
0°C to +70°C
Dice*
MAX907EPA
-40°C to +85°C
8 Plastic DIP
MAX907ESA
-40°C to +85°C
8 SO
MAX907MJA
-55°C to +125°C
8 CERDIP
Ordering Information continued on last page.
* Dice are specified at +25°C, DC parameters only.
Pin Configurations continued on last page.
MAX907/MAX908/MAX909
Single/Dual/Quad High-Speed, Ultra Low-Power,
Single-Supply TTL Comparators
2
_______________________________________________________________________________________
Positive Supply Voltage (V+ to GND) . . . . . . . . . . . . . . . . . . . . . . . . +7V
Negative Supply Voltage (V- to GND, MAX909 only) . . . . . . . . . -7V
Differential Input Voltage
MAX907/MAX908 . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to (V+ + 0.3V)
MAX909 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (V- - 0.3V) to (V+ + 0.3V)
Common-Mode Input Voltage
MAX907/MAX908 . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to (V+ + 0.3V)
MAX909 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (V- - 0.3V) to (V+ + 0.3V)
Latch Input Voltage (MAX909 only) . . . . . . . . . -0.3V to (V+ + 0.3V)
Input/Output Short-Circuit Duration to V+ or GND . . . Continuous
Continuous Power Dissipation (T
A
= +70°C)
8-Pin Plastic DIP (derate 9.09mW/°C above +70°C) . . . 727mW
8-Pin SO (derate 5.88mW/°C above +70°C) . . . . . . . . . . . 471mW
8-Pin CERDIP (derate 8.00mW/°C above +70°C) . . . . . . 640mW
14-Pin Plastic DIP (derate 10.00mW/°C above +70°C) . . .800mW
14-Pin SO (derate 8.33mW/°C above +70°C) . . . . . . . . . . 667mW
14-Pin CERDIP (derate 9.09mW/°C above +70°C) . . . . 727mW
Operating Temperature Ranges:
MAX90_C_ _ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to +70°C
MAX90_E_ _ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40°C to +85°C
MAX90_MJ_ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 55°C to +125°C
Storage Temperature Range . . . . . . . . . . . . . . . . . . . -65°C to +160°C
Lead Temperature (soldering, 10sec). . . . . . . . . . . . . . . . . . . . +300°C
ELECTRICAL CHARACTERISTICS
(V+ = 5V, T
A
= +25°C; MAX909 only: V- = 0V, V
LATCH
= 0V; unless otherwise noted.)
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ABSOLUTE MAXIMUM RATINGS
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Positive Trip Point
V
TRIP+
(Note 1)
2
4
mV
Negative Trip Point
V
TRIP-
(Note 1)
-2
-4
mV
Input Offset Voltage
V
OS
(Note 2)
0.5
2.0
mV
Input Bias Current
I
B
V
CM
= 0V, V
IN
= V
OS
100
300
nA
Input Offset Current
I
OS
V
CM
= 0V, V
IN
= V
OS
25
50
nA
Input Voltage Range
V
CMR
-0.2
V+ - 1.5
V
-5.2
V+ - 1.5
Common-Mode Rejection Ratio
CMRR
(Notes 4, 5)
50
100
µV/V
Power-Supply Rejection Ratio
PSRR
(Notes 4, 6)
50
100
µV/V
Output High Voltage
V
OH
I
SOURCE
= 100µA
3.0
3.5
V
Output Low Voltage
V
OL
I
SINK
= 3.2mA
0.3
0.4
I
SINK
= 8mA
0.4
Positive Supply Current per
Comparator
I+
(Note 7)
0.7
1.0
mA
1.2
1.8
Negative Supply Current
I-
MAX909 only: V- = -5V
60
100
µA
Power Dissipation per
Comparator
PD
(Note 8)
3.5
5.5
mW
6
10
Output Rise Time
t
r
12
ns
Output Fall Time
t
f
6
ns
SYMBOL
MAX907/908/909
MAX907/MAX908
MAX909
MAX909
(Notes 3, 4)
MAX907/MAX908
V
OUT
= 0.4V to 2.4V, C
L
= 10pF
V
OUT
= 2.4V to 0.4V, C
L
= 10pF
V
MAX909 only: V- = -5V
MAX907/MAX908/MAX909
Single/Dual/Quad High-Speed, Ultra Low-Power,
Single-Supply TTL Comparators
_______________________________________________________________________________________
3
ELECTRICAL CHARACTERISTICS (continued)
(V+ = 5V, T
A
= +25°C; MAX909 only: V- = 0V, V
LATCH
= 0V; unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Propagation Delay
t
PD+,
t
PD-
40
50
ns
Differential Propagation Delay
t
PD
1
ns
Propagation Delay Skew
t
PD
skew
2
ns
Latch Input Voltage High
V
IH
(Note 12)
2.0
V
Latch Input Voltage Low
V
IL
(Note 12)
0.8
V
Latch Input Current
I
IH
, I
IL
(Note 12)
20
µA
Latch Setup Time
t
s
(Note 12)
2
ns
Latch Hold Time
t
h
(Note 12)
2
ns
V
IN
= 100mV, V
OD
= 5mV,
(Note 9)
V
IN
= 100mV, V
OD
= 5mV,
(Note 10)
MAX909 only: V
IN
= 100mV,
V
OD
= 5mV, (Note 11)
ELECTRICAL CHARACTERISTICS
(V+ = 5V, T
A
= T
MIN
to T
MAX
; MAX909 only: V- = 0V, V
LATCH
= 0V; unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Positive Trip Point
V
TRIP+
(Note 1)
2
5
mV
Negative Trip Point
V
TRIP-
(Note 1)
-2
-5
mV
Input Offset Voltage
V
OS
(Note 2)
1
3
mV
Input Bias Current
I
B
V
CM
= 0V, V
IN
= V
OS
200
500
nA
Input Offset Current
I
OS
V
CM
= 0V, V
IN
= V
OS
50
100
nA
C/E temp.
ranges
(Notes 3, 4)
-0.2
V+ - 1.5
MAX907/908/909
MAX907/MAX908
-5.2
V+ - 1.5
MAX909
Common-Mode Rejection Ratio
CMRR
(Notes 4, 5)
75
200
µV/V
Power-Supply Rejection Ratio
PSRR
(Notes 4, 6)
75
200
µV/V
Output High Voltage
V
OH
I
SOURCE
= 100µA
2.8
3.5
V
Output Low Voltage
V
OL
I
SINK
= 3.2mA
0.3
0.4
V
MAX907/MAX908
MAX909
I
SINK
= 8mA
0.4
Positive Supply Current per
Comparator
I+
(Note 7)
0.8
1.2
mA
1.2
2.0
Negative Supply Current
I-
MAX909 only: V- = -5V
100
200
µA
Power Dissipation per Comparator
PD
(Note 8)
4
7
mW
6
11
MAX909 only,
V- = -5V
Input Voltage Range
V
CMR
M temp.
range
(Notes 3, 4)
-0.1
V+ - 1.5
V
MAX907/908/909
MAX909 only,
V- = -5V
-5.1
V+ - 1.5
MAX907/MAX908/MAX909
Single/Dual/Quad High-Speed, Ultra Low-Power,
Single-Supply TTL Comparators
4
_______________________________________________________________________________________
Note 1:
Trip Point is defined as the input voltage required to make the comparator output change state. The difference
between upper (V
TRIP
+) and lower (V
TRIP
-) trip points is equal to the width of the input-referred hysteresis zone (V
HYST
).
Specified for an input common-mode voltage (V
CM
) of 0V. See Figure 1.
Note 2:
Input Offset Voltage is defined as the center of the input-referred hysteresis zone. Specified for V
CM
= 0V. See Figure 1.
Note 3:
Inferred from the CMRR test. Note that a correct logic result is obtained at the output, provided that at least one input is
within the V
CMR
limits. Note also that either or both inputs can be driven to the upper or lower absolute maximum limit with-
out damage to the part.
Note 4:
Tested with V+ = 5.5V (and V- = 0V for MAX909). MAX909 also tested over the full analog input range (i.e., with
V- = -5.5V).
Note 5:
Tested over the full input voltage range (V
CMR
).
Note 6:
Specified over the full tolerance of operating supply voltage: MAX907/MAX908 tested with 4.5V < V+ < 5.5V. MAX909
tested with 4.5V < V+ < 5.5V and with -5.5V < V- < 0V.
Note 7:
Positive Supply Current specified with the worst-case condition of all outputs at logic low (MAX907/MAX908), and
with V+ = 5.5V.
Note 8:
Typical power specified with V+ = 5V; maximum with V+ = 5.5V (and with V- = -5.5V for MAX909).
Note 9:
Due to difficulties in measuring propagation delay with 5mV of overdrive in automatic test equipment, the
MAX907/MAX908/MAX909 are sample tested to 0.1% AQL with 100mV input overdrive. Correlation tests show that the
specification can be guaranteed if all other DC parameters are within the specified limits. V
OS
must be added to the over-
drive voltage for low values of overdrive.
Note 10:
Differential Propagation Delay is specified as the difference between any two channels in the MAX907/MAX908 (both out-
puts making either a low-to-high or a high-to-low transition).
Note 11:
Propagation Delay Skew is specified as the difference between any single channel's output low-to-high transition (t
PD
+)
and high-to-low transition (t
PD
-), and also between the QOUT and
QOUT transition on the MAX909.
Note 12:
Latch specifications apply to MAX909 only. See Figure 2.
ELECTRICAL CHARACTERISTICS (continued)
(V+ = 5V, T
A
= T
MIN
to T
MAX
; MAX909 only: V- = 0V, V
LATCH
= 0V; unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Propagation Delay
t
PD+,
t
PD-
V
IN
= 100mV, V
OD
= 5mV
(Note 9)
45
70
ns
Differential Propagation Delay
t
PD
V
IN
= 100mV, V
OD
= 5mV
(Note 10)
2
ns
Propagation Delay Skew
t
PD
skew
MAX909 only: V
IN
= 100mV,
V
OD
= 5mV (Note 11)
4
ns
Latch Input Voltage High
V
IH
(Note 12)
2.0
V
Latch Hold Time
t
h
(Note 12)
4
ns
Latch Input Voltage Low
V
IL
(Note 12)
0.8
V
Latch Input Current
I
IH
, I
IL
(Note 12)
20
µA
Latch Setup Time
t
s
(Note 12)
4
ns
MAX907/MAX908/MAX909
Single/Dual/Quad High-Speed, Ultra Low-Power,
Single-Supply TTL Comparators
_________________________________________________________________________________________________
5
50
10
1
10
100
PROPAGATION DELAY
vs. INPUT OVERDRIVE
INPUT OVERDRIVE (mV)
PROPAGATION DELAY (ns)
30
40
20
t
PD
+
t
PD
-
R
S
= 10
C
LOAD
= 15pF
80
0
10
100
10k
PROPAGATION DELAY
vs. SOURCE IMPEDANCE
20
SOURCE IMPEDANCE (
)
PROPAGATION DELAY (ns)
40
60
1k
V
OD
= 5mV
C
LOAD
= 15pF
t
PD
+
t
PD
-
70
30
0
120
PROPAGATION DELAY
vs. CAPACITIVE LOAD
40
CAPACITIVE LOAD (pF)
PROPAGATION DELAY (ns)
80
50
20
60
100
60
40
V
OD
= 5mV
R
S
= 10
t
PD
+
t
PD
-
70
30
-60
-20
60
140
PROPAGATION DELAY
vs. TEMPERATURE
40
60
TEMPERATURE (°C)
PROPAGATION DELAY (ns)
20
100
50
-40
0
80
40
120
V
OD
= 5mV
R
S
= 10
C
LOAD
= 15pF
t
PD
+
t
PD
-
5.0
3.0
1
10
1000
OUTPUT HIGH VOLTAGE
vs. SOURCE CURRENT
3.5
I
SOURCE
(µA)
V
OH
(V)
4.0
4.5
100
V
IN
= 100mV
T
A
= -55°C
T
A
= +125°C
T
A
= +25°C
__________________________________________Typical Operating Characteristics
(V+ = 5V, T
A
= +25°C, unless otherwise noted.)
0.5
0.1
0
12
OUTPUT LOW VOLTAGE
vs. SINK CURRENT
0.2
I
SINK
(mA)
V
OL
(V)
8
0.3
2
6
10
0.4
4
V
IN
= 100mV
T
A
= -55°C
T
A
= +125°C
T
A
= +25°C
2.0
0
2
8
MAX907
TOTAL POSITIVE SUPPLY CURRENT
vs. POSITIVE SUPPLY VOLTAGE
(OUTPUTS AT V
OL
)
0.5
V
CC
(V)
TOTAL I
CC
(mA)
6
1.0
3
5
7
1.5
4
T
A
= -55°C
T
A
= +125°C
T
A
= +25°C
2.0
0
2
8
MAX907
TOTAL POSITIVE SUPPLY CURRENT
vs. POSITIVE SUPPLY VOLTAGE
(OUTPUTS AT V
OH
)
0.5
V
CC
(V)
TOTAL I
CC
(mA)
6
1.0
3
5
7
1.5
4
T
A
= -55°C
T
A
= +125°C
T
A
= +25°C
4.0
0
2
8
MAX908
TOTAL POSITIVE SUPPLY CURRENT
vs. POSITIVE SUPPLY VOLTAGE
(OUTPUTS AT V
OL
)
1.0
V
CC
(V)
TOTAL I
CC
(mA)
6
2.0
3
5
7
3.0
4
T
A
= -55°C
T
A
= +125°C
T
A
= +25°C
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